Enhanced photocatalytic reduction of Cr(vi) to Cr(iii) over g-C3N4 catalysts with Ag nanoclusters in conjunction with Cr(iii) quantification based on operando low-field NMR relaxometry

Ag nanoclusters are anchored on g-C₃N₄ for the photocatalytic reduction of Cr(vi), and experience real-time monitoring by operando low-field NMR relaxometry via quantifying the concentration of paramagnetic Cr(iii) in solution.